The paper describes a procedure for examining patients with hypertrophic cardiomyopathy, which is based on the study of myocardial segmental radial deformity in relation to the thickness of the myocardial segment in order to determine the critical myocardial thickness, in which systolic myocardial dysfunction occurs first in the segment. This procedure may be used to identify indications at the beginning of therapy in asymptomatic patients with hypertrophic cardiomyopathy.